R Shiny Apps for Introductory Applied Statistics (STA 215)
Organized by chapter of "Introductory Applied Statistics:
A Variable Approach," by Gabrosek and Stephenson
(book website)
Chapter of GS 
Link to app 
Subject of app 
Ch 2: One categorical variable 
Samp Dist Prop 
Sampling distribution of the sample proportion 
CI Prop 
Confidence interval for a population proportion 
HT Prop 
Hypothesis test for a population proportion 
Ch 3: One quantitative variable 
Descriptives 
Numerical and graphical summaries for the distribution of a quantitative variable 
Guess SD 
Given four histograms and four standard deviation values,
can you match the distribution to the SD? (made by Suchir Gupta) 
CLT 
The sampling distribution of the sample mean and the Central Limit Theorem 
Std Norm 
"Forward" and "Backward" calculations for the standard normal distribution 
t Dist 
Comparing the t Distribution to the Standard Normal Distribution (and t* to z*) 
CI Mean 
Confidence intervals for population mean 
HT Mean 
Hypothesis tests for population mean 
Ch 4: Two categorical variables 
ChiSq Test 
Enter the observed counts into a twoway table and see the expected counts,
the calculation of the chisquared test statistic, a picture of the pvalue, and
a geometric interpretation of the observed/expected counts.

Ch 5: Two quantitative variables 
SlopeInt Form 
Slopeintercept form of a line 
Least Squares 
The least squares regression line has the smallest sum of squared residuals out of all lines 
Ch 6: Independent TwoGroup Data 
Indep TwoGroup 
Simulating independent twogroup data; Confidence intervals and hypothesis
tests for the difference in population means 
Type 1/2 Err 
Type 1 and 2 errors and power illustrated in the twosample t test context 
Appendix 
Tables 
Calculates the vaues given in Tables A.1A.7 
Other apps for Intro Stats
Subject 
Link to app 
App description 
Ch 3 (GS): One quantitative variable 
Conf Level 
Excellent visualization of the interpretation of the confidence
level as the proportion of confidence intervals from repeated samples
that contain the parameter (click on Confidence Interval) 
Ch 5 (GS): Two quantitative variables 
Guess Corr 
Can you guess the correlation? (that is, match four scatterplots
to four correlation values) 
Lock5 Book 
StatKey 
Apps designed for simulationbased inference approach that
encompany the Lock5 book 
Rossman & Chance Applets 
Rossman/Chance 
Popular collection of classic apps
